David Brownell wrote:
>
> > How about a simpler fix? ...
>
> Like the attached patch. This is against 2.4.4 and includes:
>
> - that simpler hashchain patch (no new spinlocks!)
> - what ac5 had (handle more flakey hardware)
> - lots of readl() to flush PCI writes
>
> That readl() stuff may, the theory goes, also handle some
> flakey hardware cases ... maybe fewer could be used, but
> in this case I thought "better safe than sorry".
>
>From OpenHCI Specification v1.0a
4.4 Host Controller Communication Area
... This structure allows the software to direct the
HC's functions without having to read from the Host Controller
except in unusual circumstances (e.g. error conditions).
Normal interaction with the Host Controller can be accomplished
by reading values from this structure that were written by the
Host Controller and by writing to the HC's operation registers.
Note: It is expected that writes to the Host Controller will
be posted and have minimal impact on CPU performance.
I think they had another design goal in mind ...;-)
- Roman
> - Dave
>
> ------------------------------------------------------------------------
> Name: ohci-0508.patch
> ohci-0508.patch Type: Nicht spezifizierter Typ (application/octet-stream)
> Encoding: quoted-printable
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